/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2025 DBeaver Corp and others
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jkiss.dbeaver.tools.transfer.ui.pages.database;

import org.jkiss.code.NotNull;
import org.jkiss.dbeaver.model.exec.DBCException;
import org.jkiss.dbeaver.model.exec.DBCResultSet;
import org.jkiss.dbeaver.model.exec.DBCSession;
import org.jkiss.dbeaver.model.runtime.DBRProgressMonitor;
import org.jkiss.dbeaver.model.runtime.ProxyProgressMonitor;
import org.jkiss.dbeaver.tools.transfer.database.DatabaseMappingContainer;
import org.jkiss.dbeaver.tools.transfer.database.DatabaseTransferConsumer;

import java.util.List;

public class PreviewConsumer extends DatabaseTransferConsumer {

    private final DBRProgressMonitor ctlMonitor;
    private final int previewRowCount;
    private boolean fetchEnded;

    public PreviewConsumer(
        DBRProgressMonitor monitor,
        DatabaseMappingContainer mappingContainer, int previewRowCount
    ) {
        super(mappingContainer.getTarget());
        ctlMonitor = new ProxyProgressMonitor(monitor) {
            @Override
            public boolean isCanceled() {
                return super.isCanceled() || fetchEnded;
            }
        };
        this.previewRowCount = previewRowCount;
        setPreview(true);
    }

    public DBRProgressMonitor getCtlMonitor() {
        return ctlMonitor;
    }

    public List<Object[]> getRows() {
        return getPreviewRows();
    }

    @Override
    public void fetchRow(@NotNull DBCSession session, @NotNull DBCResultSet resultSet) throws DBCException {
        if (getPreviewRows().size() >= previewRowCount) {
            fetchEnded = true;
            return;
        }
        super.fetchRow(session, resultSet);
    }
}
